How do the hostd, vpxa, and vpxd processes interact with each other?
What will be an ideal response?
The hostd process runs directly on the ESXi host and is responsible for managing most of the operations on the ESXi host. It is aware of all virtual machines that are registered on the ESXi host, the storage volumes visible by the ESXi host, and the status of all virtual machines. Most all commands or operations come down from vCenter Server through hostd-for example, creating, migrating, and powering on virtual machines, and so on. The vpxa acts as an intermediary between the vpxd process, which runs on vCenter Server, and the hostd process to relay the tasks to perform on the host. When you are logged on to the vCenter Server system using the Web Client, vCenter Server passes commands to the ESXi host through the vpxa process. The vCenter database is also updated. If you are using the vSphere Client to communicate directly with an ESXi host, communications go directly to the hostd process and the vCenter database is not updated.
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Match each of the following terms to its description:
I. chat room II. email III. MMS IV. message board V. SMS A. uses store-and-forward technology B. where people who do not know each other, but have similar interests, can discuss topics C. participants post comments and questions and other participants respond D. used to send brief electronic messages between mobile devices E. allows messages to include images or videos
Another problem related to indefinite postponement is called ________. This occurs when a waiting thread (let’s call this thread1) cannot proceed because it’s waiting (either directly or indirectly) for another thread (let’s call this thread2) to proceed, while simultaneously thread2 cannot proceed because it’s waiting (either directly or indirectly) for thread1 to proceed. The two threads are waiting for each other, so the actions that would enable each thread to continue execution can never occur.
a. impass b. standoff c. deadlock d. stalemate
Case-Based Critical Thinking Questions ? Case 9-1 Charles is having a lot of problems with errors in a very complicated spreadsheet that he inherited from a colleague, and he turns to another co-worker, Seymour, for tips on how to trace errors in the sheet. ? ? Seymour tells Charles that all error values begin with the same symbol, so they can be easily identified as errors. What is the symbol?
A. # B. & C. ^ D. %
Explain the influence on society of inexpensive Internet access and access to the web.
What will be an ideal response?